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... there can never be two root causes for a particular trouble ...
Quote from: rajevnaik on 10/09/2014 12:53:13... there can never be two root causes for a particular trouble ...not necessarily ... http://en.wikipedia.org/wiki/Synergy#Drug_synergyalso ... http://en.wikipedia.org/wiki/Hickam%27s_dictum
No need for theory. Here's how it works for mechanical systems:Is it supposed to move? Yes. If it moves, no problem. If not, use WD40.No. If it doesn't move, no problem. If it does, use duct tape. Ask any aircraft mechanic.